Improvement in millstone-dressing machines



' 2 Sheets-Sheet 1.

R. LYTLE. y Mllstone Dressing Machine. No. 199,839.- Patented 1an.,29`,1s7s.

waTNEssEs v INVENToR @MM5 520562111? d70 @www y @c ATTORNEY.

N.PETERS. PMOTELLJTMOGRAPMER` WASHINGTON. D c.

2 Sheets-Sheet 2.

R.L'YTLB. Millstone Dressing Machine.

No. 199,839.. Patented 1an. 29, |878.

wwNr-:sses INVENTOR m l orlyaa Q ATTORNEY N.PETERS. PHOTLITHOGRAPHL WASHINGTON. D C.

` wedges or like means.

S TATES 'PATENT oFF-WEF EoBEE'r LYTLE, 0E PINE ELATs, PENNSYLVANIA.'

A IMPROVEMENT 1N MILLSToNE-.QRESVSJING MAel-llNus.-V

' I* Specification formingp'lartof Letters PatelitNo.A 199,839, dated January 29,1878 applicationiiled Y .October 13, 187,7.'

To all whom it may concern.- v *f Be it known that jI, ROBERT LYTLE', of `Pine Flats, in the county oflndiana and State of Pennsylvania, have invented certain new and useful Improvements in Millstone-Dressing Machines, of which thefollowin g is a speci-c Figure Al'is 'a top-plan view of the base of the stai' fixed on the millstone-spindle. Fig. 2 is a perspective view, showing the levelingspider in position on the ring which moves on the base; also the screws and springs for adjusting and truing the ring on the base. Fig. 3 is a perspective, 'showing the millstonedresser in position-for use','and also red-staff. Fig. 4 is a detail to show means 'for redden-` ing the millstone toward the edge. Figs. 5 and 6'are details to show'the frame for carrying and mechanism connected with the'diamond dress and: Fig. 7',`a sectional view'of spidenfring, vand base. f

The `obj ect of the present invention is to'provide efficient means -for dressingmillstones 5 'and it consists more particularlyin securing a red-stai to the millstone, and for truing the same to a level position thereon; and 'also 'in adapting` and using the same devices that carry the staff to carry the dress; and `in the details of construction and arrangementA of v the several parts, all as ,will now in detail be more fully set out and explained.

In the accompanyin g drawings, A denotes a millstone, anda its spindle, upon which the base B ofthe sta fits, the spindle passing up through its eye or center. The said base is secured to the spindle by means of set-screws b, which pass through its upward-projecting iianges b', which surround the spindle, and, if so desired, -may also be further keyed by Upon this base B the ring G is iitted, and secured by means of setscrews c, to which are tted spring c', and by means of this attachment there is not only a secure connection, but a certain degree of eXibility is allowed, which is of very considerable advantage in devices of this sort.

The ring mayl also be trued or leveled on said base by means of the set-screws c.

The shape of the base is preferably such as now shown, its projecting central part b" fitl'on said rabbet by its points e, and thus its legs'e may be carried over'the surface of the stone, as shalljbe desired in setting or 'truing up 'the ring C, preparatory to putting thereon the red-staff. The spider has on' the lower face ofk the leg ends points made i byrset-- screws c. The movement of the three legs of the spider over the face of the, stone will beof advantage in showing-very quickly the 'proper' level of the ring C.

The annulus F has attached` to onefarm the red-staff' H, and at the other, the .frame I, which Vcarries the dress. lmounted on the ring C in'any desired' Way', tosecure safe andfregula'r motion, and this .is

vnow shown as accomplished by 'means 'of lugs f, inwardly projectingfrom itsv upperedge, Awhich serve to'sustain said annulusffor this purpose'upon the shoulder or rabbet on'the upper edge of-C. c

The redsta is detachably set 'upon'its' sup.-V

POTUg-lug 0n F, and'this is now shown by vthe slidej oint at h but any convenient method or means for carrying out `this may be used. The staff may be raised or lowered by means of `set-screw h', which will operate on some projection on the inside of said joint, or from the ring F. The marking portion of the stad' is the under side of the part h, which comes immediately over and upon the surface of the stone. The staff and the base and ring heretofore described can be used as a complete device, if so desired.

The frame I may be attached to the ring F in any secure manner, and this should be done in such a way that the connection may be easily separable, if desired. The parts are now shown as secured byascrew,whichpasses through the iianges projecting from each, one overlapping the other.

The frame is constructed and adapted in any usual way to carry the diamond and its This annulus is operative mechanism. This diamond is securedv in and to a frame, 'L' ,n 1n anyl desirable .manner, so that it may have a vertical spring movement by means of the spring i", attached to the upper end of the part that carries itg' but any convenient attachment may be provided. This frame is adaptedto be worked on its guide-bar 3 back and'forth horizontally in the frame by handle i4.

In these back-and-forth motions the diamond dresses the face of the stone, and as it passes in this way the trip 7c' on the inner face of its frame, striking on a pin, Z, projecting from arm l1 of the screw L, communicates motion to the arm m controlled by a spring, r, and to which is hinged the paWl n. This paWl then will operate the ratchet o each time the diamond` is moved as above, and thus serve to true the screw L, which, working in its Standardp, draws the frame 4along over the stone in regular procession at nearly right angles to the motion of the diamond.

By means of set-screws s, or anyl like device, the frame may be held steady on the face of the-stone while the diamond is being moved in dressing the stone, so that no injury to the diamond or. error or damage in its working 4will be caused.

To counterbalance the frame and mechanism of the dress it may sometimes be neces sary to use a weight, h, on the red-staff arm.

4This may be moved back and forth along thev yarm to give the required balance.

The guide-bar on which the frame carrying the diamond is moved may be .adjustedat willby means of the` screws t and t', the one holding the said barilaterally upon the frame and the others operating to help true it up. "In order to redden toward the eye of thestone with4 more .certainty than is possible bythe 'staff h'v, there is` attached to `the side of hr,

millstone, and its construction and operation v are such as will readily be understood, so that by means of it the operation heretofore so difficult of truly dressing a -millstonel can be accomplished easily, quickly, and certainly.

No independent novelty or claim is now urged for the iiexibleycombination of the base and ring above it and means for truing said ring on the base, for these features constitute the subject of another application made by c me for patent.

What I claim as my invention is l. The base-plate B, supporting and carrying the ring C on its upper edge, as described, its eye having an upwardly-projecting flange, b, adapted to be secured to the stone-spindle by setscrews, substantially as and for the purposes set forth. Y

2. In combination with base B and ring C,

as described, the red-staff H, fitting on the l dovetailed slide-joint IL, and adapted to be trued by set-screws h', substantially 4,as and for the purposes set forth. t 3. In ared-staff, the spider E, adaptedto b used `upon the ring G, which carries the-millstaff, substantially in the manner and for the ypurposes set forth.

4. Incombination with the red-staff H, the hingedarmfw, substantially as and for the purposes 'set forth.

5. The mill'stone-dressing frame 1I, as described, capable of being freely moved over the stone, and provided with the sustainingscrews s, whereby it is adapted lto be held steady while the diamond is worked, substantially as set forth.

Witnesses:

THOMAS O. CoNNoLLY, GEO. R. BYINGToN. 

